2. Using
the screen arrows move to the map area that you want to watch. For example,
we can watch Garachico in Tenerife North.

3.For the image
capture, it is possible to use in the keyboard Ctrl+Alt+PrtSc). In
the keyboard you can push at the same time (Ctrl+Alt+PrtSc). In that
way, the screen image is copied by the computer memory.

5. To paste the
image that has been previously copied in the computer memory, you can use
the commands (Edit >> Paste in the PAINT program) or (Ctrl+V).
You can watch now the copied image from the Google maps web page.

6. It is obvious
that you don't want to watch the navigator bars that appears in the screen.
Use the arrows of the PAINT program to center the image, that you are
interested for, in your computer screen. In the toolbar of PAINT, you can
use the icon SELECT (it is on top of the toolbar and at the right in the
last picture). Drag the mouse arrow selecting the screen area that you are
interested for. For our case, it is the rectangle where the picture of the
terrain appears.

7.Copy
now the selected area by the rectangle in the last image using (Ctrl+C)
or the command (PAINT Edit>>Copy) in the PAINT program. Then, you can
use the command (File>>New) in the PAINT to have a new and clear
screen

8.Use
(Ctlr+V) command in the keyboard, or (Edit>>Copy) in the PAINT
program to paste the selected retangle. The copy of the image appears now in
the PAINT screen. The scale of the map imported from Google maps appears now
in our screen (marked by a yellow arrow). This will be of great interest in
a near future. It is important to have this scale in the image that you have
selected.

9.Save the file
using BMP format using the commands of the PAINT program (File>> Save as.
. .). Then, you can open the previously saved BMP file using the
Canarina program.

10. To work in the
correct scale, we need to check the scale bar width in the Google map. The
Google scale bar is between the red and yellow arrows (in the next
picture). The Google bar width is in meters. When we
put the mouse pointer in the point of the red arrow we
can seethe
X-Coordinate value in the box marked by a blue arrow.
If we put now the mouse pointer in the point of the yellow arrow, we will
obtain a new value for the X-coordinate. The difference between both values
in meters must be the same that the original Google bar width in meters to
be in the correct scale.

When we put the mouse pointer in the point of red
arrow, it is found 7 m
in the X-Coordinate box (marked with a blue
arrow). If we do the same with the yellow arrow, we obtain 75 m in the box
marked with a blue arrow. Then,and in
our actual scale, the bar width have
75 m -7m = 68m. However, the correct value in the
original Google scale is 100 m. The correcting ratio is

P = 100/68 = (real value)/ (our
value).

P=100/68=1.47

11.To work in the
correct scale, we have two methods:

METHOD A:

We go now
to
Canarina program>> GIS >> Scale
calculation in the program and we get

We replace the 300m value that appears in the last
picture by 100m (the original Google
bar width in meters) and 'click' ACCEPT. Then we click firstly
in the left extreme of the original Google scale bar and secondly, we click
again in the right extreme of the original Google scale bar (both points in
the screen were market with red and yellow arrows in the last step 10).
The imported Google map is
now in the correct sale and we can check it. When we put
the mouse pointer in the red arrow, we get an X-Coordinate
value equal to 10 m (in the box market with a blue
arrow). We can also get 110 m for the position
market with the point of the yellow arrow. The difference is now 110 in -10m
= 100 m. Such a value coincides with the original
value of the Google map bar. So, the program scale is correct now.

METHOD B:

We go now
to Canarina program>> Tools >> Scale
in the program and we get

Now we multiply (our actual X-Axis
width) by P to get the correct X-axis width,

(correct
X-Axis width)=Px(X-Axis
width)

(correct
X-Axis width)=1.47x1000=1470m

And we introduce the new X-Axis
width and click ACCEPT in the last window. The imported Google
map is now in the correct scale
and we can check it. When we put the mouse pointer in the red arrow, we get
an
X-Coordinate value equal to 10 m
(in the box market with a blue arrow). We can also
get 110 m for the position market with the point of the yellow arrow. The
difference is now 110 m -10m = 100 m. Such a
value coincides with the original value of the Google map bar. So, the
program scale is correct now.

12.Now we
introduce a pollutant source and we make the simulation. The result can be
exported to a BMP file using the Canarina software.

13.We can repeat
the 6-7-8 steps 'in order to eliminate not necessary parts in the picture.
At the end we have a clean image with both the Google map and the simulation
process results.